Webster's definition of 'murder'.
In his opening narration, James Stewart (playing agent Chip Hardesty) intones, "Webster's International Dictionary defines 'murder' as 'The unlawful taking of a human life.' On a November evening in 1955, the definition became obsolete. A mass murder was being planned."
Now, that sounds very weighty and meaningful, but it's a ridiculous statement -- not to mention contradictory, even in the context of the very next sentence.
What, "murder" only applies to the taking of one life? Killing 6 or 12 or 43 or 3000 is something else? Not to mention the fact that in that very next sentence Chip says a "mass murder" was being planned. Aside from the number involved, he's just contradicted himself by referring to this mass killing as a "murder".
Murder is murder, the unlawful taking of human life, whether of 1 or 1000. Such a stupid remark, made the worse because of the screenwriter's clumsy attempt to make this sound portentous and coolly professional.